| ⇦ | 
| ⇨ |
The angle between the vectors (i+j) and (j+k) is
Options
(a) 90⁰
(b) 60⁰
(c) 30⁰
(d) 45⁰
Correct Answer:
60⁰
Explanation:
A = i + j, B = j + k
A . B = |A| |B| cos θ
where θ is the angle between two vectors A and B.
.·. A.B = (i + j).(j + k) = 1
|A| = √(1² + 1²) = √2,
|B| = √(1² + 1²) = √2
.·. cos θ = A.B / |A| |B| = 1/(√2×√2) = 1/2
θ = cos⁻¹ (1/2) = 60⁰
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Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two coaxial solenoids are made by winding thin insulated wire over a pipe
- For transistor action (1) Base, emitter and collector regions should have similar size
- If the velocity of an electron increases, then its de Broglie wavelength will
- When a bullet of mass 10 g and speed 100 ms⁻¹ penetrates up to distance 1 cm
- A particle is dropped vertically from rest, from a height.The time taken by it to fall
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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